out of sorts but anyone know hwo to tune a..

[Vipers]

Diesel Turbo astra 1.7? standard hes pulling 97bhp he thinks. what realisitcally cud he get? he says he'd be happy with 130 bhp what u recon for the folowing will give him?

i guess he might be able to get a bigger turbo, but from what? he says its a isuzu engine, so cud he nick one off of a 2.5 or 3 litre TDi isuzu thingy?
a dawes device to wind the boost up, are they universal, so wud one of ours fit it??
bigger FMIC, it is allready FM but is quite small, so where cud he nick a bigger intercooler from?
exhausts are quite scarce for it anyone know of a decent comapny that will do custom zorsts for less than £300 for a turbo back?
K&N or similar who from as we know he can get it
and a RR who do diesel?

[Nismo_Freak]

treat a diesel like a rotary in a way...

[Dan@DB-Power]

Hi Mate

I take it is a 1991-1998 model? Vauxhall do a really nice 2.2 ltr TD engine (as found in the Vectra) which does 0-60 in around the 9.5 seconds and has 125 bhp. Probably won't be to hard to fit it into the Astra.

To be honest with you I'd thtow away that Isuzu crap. My other halfs Dad has that engine in his Astra and It has been a right b1tch. Also smokes alot.

I do know that chipping you TD is a great way of tuning them though.

Cheers
Dan,

[Chris]

Originally posted by Vipers
Diesel Turbo astra 1.7? standard hes pulling 97bhp he thinks. what realisitcally cud he get?

i guess he might be able to get a bigger turbo, but from what? he says its a isuzu engine, so cud he nick one off of a 2.5 or 3 litre TDi isuzu thingy?
a dawes device to wind the boost up, are they universal, so wud one of ours fit it??
bigger FMIC, it is allready FM but is quite small, so where cud he nick a bigger intercooler from?
exhausts are quite scarce for it anyone know of a decent comapny that will do custom zorsts for less than £300 for a turbo back?
K&N or similar who from as we know he can get it
and a RR who do diesel?
tbh tell him not to tune an already overstressed shite engine

realistically he could get a peugeot 306 td they go like feck and are much better than the astra

[Clong]

Getting more power out of a diesel engine usually involves getting more fuel in. Shoving a bigger turbo, IC, filter or even exhaust won't do a great deal, however running bigger injectors and mapping the fuel chip (for electronic controlled injectors) will increase power quite abit. The real trick is to get past emissions once this is done.

http://www.tdiclub.com/TDIFAQ/

Has some tuning tips for the VW tdi engine, but the principles will remain the same.

[dunc]

I'd just up the boost, TD's get surprisingly good power and troque gains. It's not the end of the world if he breaks the crappy 1.7 lump anyway.

Dunc.

[docwra]

I know the 2.2 has an adjustable actuator as standard, and reckon the 1.7 does too ............. easy start5
Then chip it and watch it fly!! :D

[Kes]

Diesel engines behave very differently to petrol engines, it's not so simple as just winding up the boost, you have to add fuel to get the engine to generate enough exhaust gas to get the boost. Don't forget a Diesel engine has no throttle...

I'm not familiar with the Vauxhall lump, is it Mechanical or Electronic injection? Electronic, you'll need a chip. Mechanical, you can adjust the fuel pumps and make some pretty impressive gains, I've seen a Nova 1.5td with over 110 BHP, Pug 306s over 130 (90 standard) and quite a few others.

[Clong]

Most diesels are underfueled, they only time they don't run lean is at full throttle (hence why they kick out a shitload of smoke). Upping the boost won't do jack unless there is an increase in fuel to match. The fuel isn't drawn into the cylinders by airlflow, it is injected. Upping the boost might mean you get more airl in there but there is still the same amount of fuel going in, so all you will do is achieve a leaner mix (less smoke though). Another thing to consider is that diesel tubbys are small, upping the boost may move them out of the effieceny range, having the opposite effect of what you are trying to do.

[Duff Man]

On a similar note, anyone know if its possible to get any more oooompf out of a mechanical injection non turbo diesel (the 1.4 pig slow heap of shite they put in metros, euuughhh! :cry: )?

Preferably cheaply, since its only a part time measure until I can get cash together to buy something better!

Cheers!

[StuyMac]

Used to have a Sierra TD, with a few Mods, Cossie airbox, Straight through Exhaust, Switchable boost (10psi low and 15psi high), and the fuel played with a little to increase flow.

Not sure about how much power it was putting out, but it was very similar (on high boost) to the 2.0 twin cam I had after it. Only problem was, it revved out at about 115mph in 5th at 4800 rpm :(

[shadowninja]

i really cant believe i've just read a thread on tuning a diesel engine... initially i was gonna just close the window, but i got drawn in! :cry: am i that bored? :D

[Vipers]

he did say he'll buy an s13 for £500 odd if it was local which is cool but other than that he wants some more performance out of his taxi :rolleyes:

[Actual_Ben_Taylor]

Rig up a DIY propane injection system... It'll work like nitrous :D

[Pete C]

Originally posted by shadowninja
i really cant believe i've just read a thread on tuning a diesel engine... initially i was gonna just close the window, but i got drawn in!

Actually I'm finding it quite interesting. :)

So the main principle is to incrase the amount of fuel going in, but this is a trade off with the amount of smoke you get?

[Clong]

Originally posted by Pete C
Actually I'm finding it quite interesting. :)

So the main principle is to incrase the amount of fuel going in, but this is a trade off with the amount of smoke you get?

As far as i know, that pretty much sums it up. With respect to the TDI engine in golf, they come in various states of power (i use this term in loosest possible way), 90, 110, 130 & 150. The 90 and the 110 are the same apparently, but teh 110 has bigger injectors and a slightly different fuel map. A 90bhp can converted to 110 just by changing the injectors, no other mods are required abd teh amp can be left as it is. The 130 and the 150 use different turbo, VANOS (sp?) system i think. Variable trim/compressor blades or something, andyf knows a bit about those turbo's i think.

As i said, most of the info i have given is based in the VW TDi engines, which are direct injection. The principles for in-direct injection remain the same i would have thought.

The only reason i looked into this was i run a Golf TDi as a second car. I generally do all servicing work on my cars, scoured the net for info on them and found a load about tunning diesels. Quite impressed with the Golf, for an oil burner it's not a bad drive at all.